#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
int main()
{
    int A, B;
    scanf("%d %d", &A, &B);
    int K = A + B;
    long long sum = 1;
    while (K >= 1)
    {
        sum = sum * K;
        K--;
    }
    printf("%lld\n", sum);
    return 0;
}


#include<stdio.h>
int main()
{
    int N, M;
    double price;
    scanf("%d %d", &N, &M);
    while (N)
    {
        scanf("%lf", &price);
        if (price < M)
        {
            printf("On Sale! %.1lf\n", price);
        }
        N--;
    }
    return 0;
}